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碶塊式單向軸(zhou)承是(shi)在(zai)一個方向上可(ke)以自由轉動，而(er)在(zai)另一個方向上鎖死的一種(zhong)軸(zhou)承。單向軸(zhou)承也叫超越(yue)離合器，只(zhi)是(shi)根據行業不(bu)同，作用不(bu)同來命(ming)名的。